1iup
From Proteopedia
(New page: 200px<br /><applet load="1iup" size="450" color="white" frame="true" align="right" spinBox="true" caption="1iup, resolution 1.60Å" /> '''meta-Cleavage produc...) |
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| - | [[Image:1iup.jpg|left|200px]]<br /><applet load="1iup" size=" | + | [[Image:1iup.jpg|left|200px]]<br /><applet load="1iup" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1iup, resolution 1.60Å" /> | caption="1iup, resolution 1.60Å" /> | ||
'''meta-Cleavage product hydrolase from Pseudomonas fluorescens IP01 (CumD) S103A mutant complexed with isobutyrates'''<br /> | '''meta-Cleavage product hydrolase from Pseudomonas fluorescens IP01 (CumD) S103A mutant complexed with isobutyrates'''<br /> | ||
==Overview== | ==Overview== | ||
| - | 2-Hydroxy-6-oxo-7-methylocta-2,4-dienoate hydrolase (CumD) from | + | 2-Hydroxy-6-oxo-7-methylocta-2,4-dienoate hydrolase (CumD) from Pseudomonas fluorescens IP01 hydrolyzes a meta-cleavage product generated in the cumene (isopropylbenzene) degradation pathway. The crystal structures of the inactive S103A mutant of the CumD enzyme complexed with isobutyrate and acetate ions were determined at 1.6 and 2.0 A resolution, respectively. The isobutyrate and acetate ions were located at the same position in the active site, and occupied the site for a part of the hydrolysis product with CumD, which has the key determinant group for the substrate specificity of related hydrolases. One of the oxygen atoms of the carboxyl group of the isobutyrate ion was hydrogen bonded with a water molecule and His252. Another oxygen atom of the carboxyl group was situated in an oxyanion hole formed by the two main-chain N atoms. The isopropyl group of the isobutyric acid was recognized by the side-chains of the hydrophobic residues. The substrate-binding pocket of CumD was long, and the inhibition constants of various organic acids corresponded well to it. In comparison with the structure of BphD from Rhodococcus sp. RHA1, the structural basis for the substrate specificity of related hydrolases, is revealed. |
==About this Structure== | ==About this Structure== | ||
| - | 1IUP is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pseudomonas_fluorescens Pseudomonas fluorescens] with ALQ as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/2-hydroxymuconate-semialdehyde_hydrolase 2-hydroxymuconate-semialdehyde hydrolase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.7.1.9 3.7.1.9] Full crystallographic information is available from [http:// | + | 1IUP is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pseudomonas_fluorescens Pseudomonas fluorescens] with <scene name='pdbligand=ALQ:'>ALQ</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/2-hydroxymuconate-semialdehyde_hydrolase 2-hydroxymuconate-semialdehyde hydrolase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.7.1.9 3.7.1.9] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IUP OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Fushinobu, S.]] | [[Category: Fushinobu, S.]] | ||
[[Category: Hidaka, M.]] | [[Category: Hidaka, M.]] | ||
| - | [[Category: Jun, S | + | [[Category: Jun, S Y.]] |
[[Category: Nojiri, H.]] | [[Category: Nojiri, H.]] | ||
[[Category: Omori, T.]] | [[Category: Omori, T.]] | ||
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[[Category: substrate specificity]] | [[Category: substrate specificity]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:16:04 2008'' |
Revision as of 11:16, 21 February 2008
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meta-Cleavage product hydrolase from Pseudomonas fluorescens IP01 (CumD) S103A mutant complexed with isobutyrates
Overview
2-Hydroxy-6-oxo-7-methylocta-2,4-dienoate hydrolase (CumD) from Pseudomonas fluorescens IP01 hydrolyzes a meta-cleavage product generated in the cumene (isopropylbenzene) degradation pathway. The crystal structures of the inactive S103A mutant of the CumD enzyme complexed with isobutyrate and acetate ions were determined at 1.6 and 2.0 A resolution, respectively. The isobutyrate and acetate ions were located at the same position in the active site, and occupied the site for a part of the hydrolysis product with CumD, which has the key determinant group for the substrate specificity of related hydrolases. One of the oxygen atoms of the carboxyl group of the isobutyrate ion was hydrogen bonded with a water molecule and His252. Another oxygen atom of the carboxyl group was situated in an oxyanion hole formed by the two main-chain N atoms. The isopropyl group of the isobutyric acid was recognized by the side-chains of the hydrophobic residues. The substrate-binding pocket of CumD was long, and the inhibition constants of various organic acids corresponded well to it. In comparison with the structure of BphD from Rhodococcus sp. RHA1, the structural basis for the substrate specificity of related hydrolases, is revealed.
About this Structure
1IUP is a Single protein structure of sequence from Pseudomonas fluorescens with as ligand. Active as 2-hydroxymuconate-semialdehyde hydrolase, with EC number 3.7.1.9 Full crystallographic information is available from OCA.
Reference
Crystal structures of a meta-cleavage product hydrolase from Pseudomonas fluorescens IP01 (CumD) complexed with cleavage products., Fushinobu S, Saku T, Hidaka M, Jun SY, Nojiri H, Yamane H, Shoun H, Omori T, Wakagi T, Protein Sci. 2002 Sep;11(9):2184-95. PMID:12192074
Page seeded by OCA on Thu Feb 21 13:16:04 2008
Categories: 2-hydroxymuconate-semialdehyde hydrolase | Pseudomonas fluorescens | Single protein | Fushinobu, S. | Hidaka, M. | Jun, S Y. | Nojiri, H. | Omori, T. | Saku, T. | Shoun, H. | Wakagi, T. | Yamane, H. | ALQ | Alpha/beta-hydrolase | Aromatic compounds | Beta-ketolase | Cumene | Cumene degradation | Isopropylbenzene | Meta-cleavage compound hydrolase | Pcb | Polychlorinated biphenyl degradation | Pseudomonas fluorescens ip01 | Substrate specificity
